Update feature/README.md

Signed-off-by: Alexey Gladkov <legion@altlinux.org>

Author: legionus

feature/README.md

@@ -1,5 +1,12 @@
 # Feature: bootloader
 
-TODO
+The feature adds the ability to create an image that can act as a bootloader.
+The image looks for the partition that is mounted at /boot or the partition
+where the /boot directory exists.
+
+# Config files
+
+* `/etc/bootloader.mk` -- the configuration file for creating the image.
+* `/boot/bootloacer.conf` -- the configuration file lists the kernels and initrd
+   for later boot.
 
-Config file: `/etc/miboot.mk`